Double-pawl coupling.



PATENTED FEB. 25, 1908.

M. HANUSGH, DOUBLE PAWL COUPLING.

ho This vention relates to a double pawl 29 the direction indicated by the arrow, w

' hub oi L-UL'; driving wheel or into that of a Y nal uisoflmnilgmninn BAD; austere-Humanity r a y it, A l :i v l .QUR

, 35o. a zaeco.

"1 '0 all whom itmay concern:

Be it known that 1, MAX HANUseH, official, a citizen of the Em ire of Austria-Hungary, residing at Marienhad, Bohemia, Austria- 5 Hungary, have invented certain new and useful Im rovements in Double-Pawl Couplings, of which'the following is a specification, reference being had therein to the accompanyingdrawing.

coupling specially applicable for motor driven vehicles and which permits of driving or run ning idle, when rotated in either direction. Figure 1 of the annexed drawing is a verti 1 5 cal section through the coupling on line A-B of Fig. 2. Fig. 2 is a cross section through the coupling on line C-D of Fi 1. Fig. 3

Y is a, vertical section like Fig. 1 ut showing the pawls in gear for driving the couplingliiln in Fig. l and 2 the doublepawls are shown in the central position, being out of engagement.

By pr' f"-ence the coupling is built into the disk adapted to rotate the driving wheelv shaft. I

The con. ling is constructed .as follows:

Upon the riving shaft a is keyed a disk b having on its periphery segmental projections 0. Upon this disk is mounted a second ring-likedisk d, the inner periphery of which s 'ental recesses f corresponding in number with that of and slightly longer in the arc than the said projections a so that the outer disk 11 to a certain extent will run idle upon the inner disk I), that is to say, will not be engaged until the segmental rojections chave run a distance equal to alf of 40 the difference in the length of arc between the projections c and the recesses Upon [the outer disk (1 is mounted, say by means of antifriction balls, the wheel hub m having internally ratchet teeth n pointing alter-' n'atelyinop -osite directions. The disk carries a series of double pawls p adapted to oscillate, both arms of each of which are connected by s n s q, q to po nts 00f the disk bl When t e iskd runs idle Specificatiofiof Lettersgiatent Application filed April 12'. a sem-m ..s11.s7a-

SO' 'and-is inthe middle position as shown 1n j Patent ed Feb. 25', 1908.

. 1; the points '0 coincide with the points a where the radius to the fulcrum j" of the res ective double awl intersect theperi 16Iy of the inner is'k b. The said springs q 'eing all of one length and stren th, m the relative positionofthe two disks 1?, (1 shown in Fig. 1, the double pawls willtake u such a position, that each pawl is perpen icular tothe radius 1 a: of the pawl fulcrum 12- In this position both armsof each double pawl are out of ear with the internal ratchet teeth of the hub m. If however the shaft 1 is'driven' in one or the other direction, for

instance that indicated by the arrows .2,

shown in 3, the disk (I carrying-the pawl owing to being idle and the frictional resistance at its eriphery', will remain behind the inner disk until the segmental rejections c on the inner disk I) have passed t irough and arrived at the-ends of the se mental recesses f; during this operation -t e points 4) at which the springs q, q are'secured will have moved from its central position and the s ring q situated in front'of the pawl in the lrection of the rotation been released-while the one at the back has been tensioned, which causes the pawls p to turn and bring their front ends against the inner eriphery of the hub m on which they will s ide until they arrive at the bottom of the teeth and thereby enga e the hub m.

' If the spee of the driven wheel m exceeds that of the drivingshaft a, for instance when goin down hill, or when the latter is sto ped, t e inner periphery of the hub m Slit es over-the pawls p and the outer wheel will runidle, without using the motor shaft.

Owing to the wheel of the hub m being idle when running ata greaterspeed than the driving shaft, the device described may also be used in place of the usual differentia gear, as when turning, the inner wheel will run at a s eed corresponding with that of the driving shaft while the outer .wheel runs quicker.

Having now particularlydescribed my invention What I claimis:

A double awl coupling com rising a notched disk secured upon the s aft, disk (1 loose on the shaft at opposite sides of disk b having inner teeth projecting into the rerecesses and a Wheel hub lbosely mounted- 6n Witnesses:

ces ses of disk 1) their. length in circular direeand ads ted to be engaged'by either end of tion being shorter than the recesses, ,double the pew ssubstantially as deseribed. I0 armed Pawlsfnlcrumed between the disks (2, v In testimony whereof I hereunto aflix-my sfirings connecting. the ends of the awls to signature in presence of twg witnesses.

t e dlsk 'b at points aboutth' mid e of the MAX HANUSCH.

thepei'iphery of the 'disks dhavjnginner EMILE MfTLLER, ratchet teeth projecting btWGIliSaid disks 1 BRUNO :Scnmnr. 

